Abstract

27) were adult neuroleptic-medicated inpatients with a DSM-III-R diagnosis of chronic schizophrenia (n = 22) or schizoaffective disorder (n = 5). Paired t tests revealed higher B! than NAART estimates for FSIQ (NAART m =97.2, BI m z 103.8; t[23] 2.63, p < 0.05), VIQ (NAART m -93.7, BI m = 103.2; t[23] =3.5, p < 0.05), but not PIQ. NAART and BI correlations with age, illness duration, education, and mental status (MS) revealed no significant associations. A trend between NAART and MS (r 0.37, p = 0.07) emerged. The possible NAART/MS relation suggested the NAART may be sensitive to cognitive deterioration. One possibility is that the ability to read/retrieve irregular words declines in schizophrenia, consistent with models of left hemisphere dysfunction. Studies with matched controls and nonchronic patients will determine if lower NAART scores reflect lower premorbid IQ or deterioration. As four of six BI components are demographic in nature and relatively independent of schizophrenia disease processes, these results may suggest that the BI is better suited for premorbid IQ estimation in schizophrenia.

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